Fracture-matrix interaction in Topopah Spring Tuff: Experiment and numerical analysis

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Description

Fracture-matrix interaction is investigated through combined physical and numerical experimentation. Two slabs of Topopah Spring Tuff are mated to form a vertical saw cut fracture to which water is supplied. X-ray imaging is used to obtain the matrix porosity field and transient saturation fields as water moves from the fracture into the matrix. Porosity, hydraulic conductivity, and pressure/saturation relations of the matrix are measured on small cores taken from adjacent rock. Correlations between hydraulic properties and porosity are developed and modeled. Numerical simulations using TOUGH2 are accomplished with a series of property fields of increasing detail. Property fields are modeled ... continued below

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10 p.

Creation Information

Glass, R.J.; Tidwell, V.C.; Flint, A.L.; Peplinski, W. & Castro, Y. May 1, 1994.

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Authors

  • Glass, R.J.
  • Tidwell, V.C. Sandia National Labs., Albuquerque, NM (United States)
  • Flint, A.L. United States Geological Survey, Nevada Test Site, NV (United States). Yucca Mountain Project
  • Peplinski, W. Spectra Research Inst., Albuquerque, NM (United States)
  • Castro, Y. Purabo Univ., (Caguas, PR). Dept. of Engineering

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Fracture-matrix interaction is investigated through combined physical and numerical experimentation. Two slabs of Topopah Spring Tuff are mated to form a vertical saw cut fracture to which water is supplied. X-ray imaging is used to obtain the matrix porosity field and transient saturation fields as water moves from the fracture into the matrix. Porosity, hydraulic conductivity, and pressure/saturation relations of the matrix are measured on small cores taken from adjacent rock. Correlations between hydraulic properties and porosity are developed and modeled. Numerical simulations using TOUGH2 are accomplished with a series of property fields of increasing detail. Property fields are modeled using the measured porosity field divided into 1, 3, 5, 11, and 21 porosity groups with the hydraulic properties assigned from the developed correlations and the average porosity within each group. Comparison with experimental results allows us to begin to evaluate current matrix property measurement techniques, specific matrix property models, property estimation procedures, and effects of matrix property variability.

Physical Description

10 p.

Notes

OSTI as DE94010754

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  • International high-level radioactive waste management conference, Las Vegas, NV (United States), 22-26 May 1994

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  • Other: DE94010754
  • Report No.: SAND--94-0443C
  • Report No.: CONF-940553--46
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 145224
  • Archival Resource Key: ark:/67531/metadc624683

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • May 1, 1994

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

Description Last Updated

  • April 14, 2016, 3:58 p.m.

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Glass, R.J.; Tidwell, V.C.; Flint, A.L.; Peplinski, W. & Castro, Y. Fracture-matrix interaction in Topopah Spring Tuff: Experiment and numerical analysis, article, May 1, 1994; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc624683/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.